On Mon, Apr 10, 2017 at 08:03:48PM +0200, Daniel Pocock wrote: > > > On 03/04/17 17:12, Antonio Terceiro wrote: > > Hello, > > > > I am trying to upload the required documents in the Canadian visa > > process, but their application won't accept any PDF file saying it > > is "not a valid PDF file". I double-checked every file and they > > _are_ valid PDFs, I even tried creating a very simple PDF from > > LibreOffice, but that was also rejected. So, something in their > > system is broken. > > > > Then, I tried the upload using Chromium instead of Firefox, and it > > worked. I'm not sure what exactly is broken, must be something > > javascript-related. > > > > So, there you have it: if you also have issues with invalid PDF > > files on Firefox and you are sure the PDFs are not invalid, you can > > try using Chromium to do the uploads. > > > > On a previous visit to Canada, we observed similar issues. > > I think I actually tried multiple browsers and they all periodically > didn't work at different times. > > Did they also try to make you fill out a PDF form that requires a > non-free PDF reader? Well, they didn't try, they did it. AFAICT the form require proprietary PDF features (some type of javascript-like thing) that is not supported by any of the free PDF readers. I had to use Acrobat Reader installed via playonlinux.
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